1 files changed, 40 insertions, 0 deletions
diff --git a/src/syscall/rlimit_test.go b/src/syscall/rlimit_test.go
new file mode 100644
index 0000000000..e48f45e3aa
--- /dev/null
+++ b/src/syscall/rlimit_test.go
@@ -0,0 +1,40 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package syscall_test
+
+import (
+	"os"
+	"runtime"
+	"testing"
+)
+
+func TestOpenFileLimit(t *testing.T) {
+	// For open file count,
+	// macOS sets the default soft limit to 256 and no hard limit.
+	// CentOS and Fedora set the default soft limit to 1024,
+	// with hard limits of 4096 and 524288, respectively.
+	// Check that we can open 1200 files, which proves
+	// that the rlimit is being raised appropriately on those systems.
+	fileCount := 1200
+
+	// OpenBSD has a default soft limit of 512 and hard limit of 1024.
+	if runtime.GOOS == "openbsd" {
+		fileCount = 768
+	}
+
+	var files []*os.File
+	for i := 0; i < fileCount; i++ {
+		f, err := os.Open("rlimit.go")
+		if err != nil {
+			t.Error(err)
+			break
+		}
+		files = append(files, f)
+	}
+
+	for _, f := range files {
+		f.Close()
+	}
+}